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githubGitHub Advisory DatabaseGHSA-G5V4-5X39-VWHX
HistoryFeb 15, 2022 - 12:32 a.m.

Zip slip directory exploit in github.com/deislabs/oras

2022-02-1500:32:04
CWE-22
CWE-59
GitHub Advisory Database
github.com
13

7.7 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

4 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:S/C:N/I:P/A:N

0.001 Low

EPSS

Percentile

34.2%

Impact

The directory support (#55) allows the downloaded gzipped tarballs to be automatically extracted to the user-specified directory where the tarball can have symbolic links and hard links.

A well-crafted tarball or tarballs allow malicious artifact providers linking, writing, or overwriting specific files on the host filesystem outside of the user-specified directory unexpectedly with the same permissions as the user who runs oras pull.

Precisely, the following users of the affected versions are impacted

  • oras CLI users who runs oras pull.
  • Go programs, which invokes github.com/deislabs/oras/pkg/content.FileStore.

Patches

The problem has been patched by the PR linked with this advisory. Users should upgrade their oras CLI and packages to 0.9.0.

Workarounds

For oras CLI users, there is no workarounds other than pulling from a trusted artifact provider.

For oras package users, the workaround is to not use github.com/deislabs/oras/pkg/content.FileStore, and use other content stores instead, or pull from a trusted artifact provider.

References

For more information

If you have any questions or comments about this advisory:

CPENameOperatorVersion
github.com/deislabs/oraslt0.9.0

7.7 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

4 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:S/C:N/I:P/A:N

0.001 Low

EPSS

Percentile

34.2%